Vacuum cleaner nozzle having internal baffles



Patented Jan. 1, 1952 VACUUM GLEANER NOZZLE HAVING INTERNAL BAFFLE'S Dav d R. Qre w Dougla Ar z- Application May 17, 1948, Serial N 0. 27,472

1 Claim- 1 This invention comprises novel. and usefu improvements in a furniture leanin tool and more specifically pertains to a vacuum cleaner nozzle which is particularly adapted for cleaning the fiat surfaces of furniture and the like.

The principal object of this invention is to provide a nozzle or attachment head for vacuunii cleaners which will readily clean smooth surfaces with an improved .and efilcient cleansing action and a more efiective use of the vacuum cleaner suction.

The above object is attained in the present invention by providing a vacuum cleaner nozzle or head which has a flat open base divided by upwardly extending partitions into a plurality of air inlet chambers, which at their upper ends communicate freely with a pair of air ducts er passages formed in the lower'portion of a transversely extending suction tube which is preferabl integrally but may be otherwise rigidly attached to the nozzle or head, which suction tube is designed for removable attachment to a vacuum cleaner hose or the like.

A still further feature of the invention resides in the provision of a vacuum cleaner nozzle or head as set forth in the preceding object, wherein the lower marginal rim of the open ended head is adapted to rest upon the surface to be cleansed and is provided with a plurality of laterally extending notches therethrough to provide air inlet ports for admitting air into the interior of the hollow head and into the air inlet chambers therein with a view to drawing the cleansing inlet air of the attachment directly across and closely adjacent to the surface to be.

cleansed and into the interior of the nozzle.

Yet another object of the invention resides in the provision of a vacuum cleaner nozzle or bleed as set forth n the precedin ra raphs, wherein the suction tube is divided by diametrically positioned, longitudinally extending baffies therein into a plurality of segmental shaped ducts or passages, the lowermost of these passages having free and continuous communication with the air inlet chambers of the head, all of the passages having free communication with the source of suction, and the upper passages freejly communicating with the lower passages at the end thereof opposite from the source of suction.

These, together with various ancillary features and objects oi the invention which will later become apparent as the following description proceeds, are attained by this device, a preferred embodiment of which has been illustrated by way of exa p e only in the accomnamin drawings, wherein:

Fi ure 1 is a perspective view showing a preferred embod me of th inventi n and illust time its atta hment to a p t o of a va u m cleaner suction hose or the like;

Fig, 2 is a vertical sectional view through the improved cleaner nozzle or head o g h ubject of 0. .1. i e tion;

Fi ure 3 is a vert al sectional i w t ken sub-- -tantiallv open the lane of he s c ion n i 3. o Fi ure 2 and at ri ht angles to he. vie of Figure 2;- and,

F ure 4 a ireeniehtarv verti al ectional viewta en sub tantially upon the ane f th section line 4*! o F gure 2-,

Referrin now more spec fic l to the accomna vihe d awings wherein ik numeral d snat s mila par s throu hout t ari us ws. it will be seen t at hume al 0 des nat s g neral t e improved acu m aner n z e head formin he subject of th s ve t n a d which is s ow as bein rcmo v a ached to a terminal. lee 2 w th. whi h a h s l4 n formin a par oi a n nt o al va uum cleaner, not shown, is provided.

The eleaner nozzle or head I0 includes a suction tube I6 which is preferably of circular cross se t on a t u h n t l m t d to t is p and which tub is a one e d apt to b siidably en aged upon, the. te mina s e ve 1 o the hose M as shown and indi ated n u e l in a known mann rpfip f di from 342d Pl'fif" erably formed inte ral th the u e. 15, is a c portionv I 8 including na a l l'd wnward extending walls, see Figure from. the lower ends of which extend downwardly, arcuately contoured outer walls 23 and parallel rear and front walls 22 and 24.

Preferably, this entire nozzle or head may be formed from a single sheet metal member in various known manners.

As shown best in Figures 3 and 4, the end of the suction tube [6 opposite to. that which con.- nects with the terminal sleeve l2 of the vacuum cleaner hose M, is provided with a detachable closure plate Zfi of any desired construction. By this means, air is inducted solely from the open, flat, generally rectangular shaped lower end of the nozzle or head 26, and is delivered by means of the members i2 and M to the source of suction such as the motor of the vacuum cleaner or the like.

As shown in Figures 2 and 3, the cylindrical interior of the suction tube 16 is divided by diametrically disposed bafiies 28 and 30, into a plurality of arcuately shaped longitudinally extending channels. It is to be understood that various numbers of baflies may be employed, depending upon the number of longitudinal conduits, ducts or chambers which it is desired to form within the suction tube I6, to such baiiles which are perpendicularly disposed being shown in Figures 2 and 3.

Preferably, the baffle 28 is horizontally disposed while the baiiie 30 is vertically disposed, this latter baffle extending down into the hollow portion of the head, between the outer walls thereof, and divides the hollow interior of the head into two equal parts as shown at 32 in Figure 2. As will be further seen, the lower edge of this partition 32 is spaced vertically from the lower open edge or face of the nozzle for a purpose to be later set forth.

As shown best in Figures 2 and 4, the hollow interior of the nozzle or head is further divided by means of downwardly extending partitions 34, which are parallel to each other and to the walls l8, which partitions 3s terminate in arcuately shaped walls 36 likewise terminating in spaced vertical relation to the lower edge of the nozzle or head. The outer walls 20 and the rear and front walls 22 and 24, preferably terminate at their lower edges in a generally rectangular marginal flanged edge as at 38. This edge is adapted to form a snugly fitting, sliding engagement with the surface to be cleansed by the vacuum cleaner nozzle. Throughout various predetermined portions of its perimeter, the flanged edge 33 is provided with a plurality of notches or slots 40 which constitute air inlet ports to admit air into the chambers defined by the portions 32 and 36 within the interior of the vacuum cleaner head. In this connection, it will be noted by reference to Figures 2 and 3, that the various partitions 32', and 3B terminate slightly above the plane of the lower surfaces of the flanges 38, this clearance being indicated at 42 in these figures. This clearance is necessary to establish a restricted communication between the various chambers in the interior of the hollow vacuum cleaner head. As will be seen in Figure 2, the outer walls 28, the arcuate walls 36, and the partition 32, define four chambers, denoted 44, 46, 48 and 50 in the interior of the head, each of these chambers communicating at its upper end with the hollow interior of the suction tube 16. The above mentioned diametrical bailies divide the suction tube into quadrant shaped ducts, passage ways or chambers as indicated at 52, 54, 56 and 58. As will readily be seen, the two chambers 44 and 46 in the head have free communication with the quadrant shaped passage 56, while the chambers 48 and 50 likewise have free communication with the quadrant shaped passage 58. Thus, all four of the air inlet chambers communicate with two of the ducts or passage ways in the suction tube.

As shown in Figure 3, the diametrically disposed baflles terminate inwardly of the ends of the suction tube l6, as shown at B0 andfiz. Of course, any suitable dimensions may be employed as desired, but it has been found to be satisfactory in a typical commercial installation, to space the ends of the bafiles which are opposite the source of suction, as at 60, a distance of about one quarter of an inch from the closure plate 26 at the end of the tube, while the opposite ends of the baffles are indicated at 62, may be spaced from two to four inches from the suction end of I the tube. Thus, all four of the ducts or passage ways 52, 54, 56 and 58, have free and uninterrupted communication with the common source of suction through the sleeve 12 and vacuum cleaner hose l4, while the two upper passage ways 52 and 54 have a restricted but continuous communication with the lower passage ways 56 and 58, at the opposite end thereof, by means of the clearance between the ends of the baffles at and the cap or closure plate 26.

It will thus be noted that the suction of the vacuum cleaner motor is applied directly to the two lower chambers 56 and 58 and thereby directly to the air inlet chambers, and is likewise applied to the opposite ends of the lower passage ways by means of the upper passages 52 and 54 and connect at the opposite ends thereof.

It is contemplated that this division of the passage area of the suction tube I6 and the application of the suction to both ends Of the passage ways 55 and 58, will cause a more even distribution of flow of air from the plurality of air inlet chamber than would a single continuous passage which is not sub-divided by baflies.

From the foregoing, the construction and operation of the device will be readily understood and further explanation thereof is deemed to be unnecessary.

However, since numerous modifications and equivalents will readily occur to those skilled in the art after a consideration of the foregoing specification and accompanying drawings, it is not decided to limit the invention to the exact construction shown and described, with all suitable modifications and equivalents may be resorted to falling within the scope of the appended claim.

Having described the invention, what is claimed as new is:

In a vacuum cleaner nozzle, a hollow head curving upwardly from its opposite ends to its mid portion and having a flat, open base, air inlet ports in the lower edge of said base, partitions in said head defining a plurality of air inlet chambers communicating with said ports, a suction tube mounted above said head at its mid portion and communicating with said chambers, longitudinally extending, perpendicular diametrical baffles in said tube defining pairs of upper and lower quadrant shaped chambers, each communicating with a common source of suction, the lower pair of quadrant shaped chambers having direct entry to each of said air inlet chambers and the upper and lower pair of said quadrant shaped chambers having communication at the opposite end of said suction tube from said common source of suction.

DAVID R. CRESWELL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

